[lammps-users] Suspected beg in example script in.pour.2d

Dear Axel and steve,
While running the in.pour.2d(example) code to pour polydisperse particles under gravity , I monitor the pairwise granular forces and it seems there are many interaction entries with identically zero forces. If there is no force between two particles , then why it is being considered as an interaction.


How do you know beforehand that there will be no (significant) interaction?

For more background information please have a look at the discussion of how to efficiently employ cutoffs and neighbor lists in MD simulations in the LAMMPS paper, the relevant publications in those sections and suitable MD text books.